Cheonsa 
A spiritual being believed to act as a messenger for a higher
being. Superior to humans in power and intelligence with
extraordinary beauty, purity, or kindliness. Conventionally
represented in human form with wings
Suho Cheonsa 
An angel that is assigned to protect and guide a particular person,
group, kingdom, or country. Belief in guardian angels can be
traced throughout all antiquity
Talaghan Yeonghon 
A spirit being who has been jaded by heartbreak but still has its
inner beauty and compassion. Not a complete dark spirit. They
still believe in humanity. However, they are unable to love.
Eoduun Jeongsin (
These spirits have been banished from the realm for disobeying.
Each has their individual purpose. Dark spirits know right from
wrong but they choose to do bad.